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The Oxford–AstraZeneca COVID‑19 vaccine, sold under the brand names Covishield [31] and Vaxzevria [1] [32] among others, is a viral vector vaccine for the prevention of COVID-19. It was developed in the United Kingdom by Oxford University and British-Swedish company AstraZeneca, [33] [34] [35] using as a vector the modified chimpanzee adenovirus ChAdOx1. [36] The vaccine is given by ...
As the oldest vaccine, the smallpox vaccine has gone through several generations of medical technology. From 1796 to the 1880s, the vaccine was transmitted from one person to another through arm-to-arm vaccination. Smallpox vaccine was successfully maintained in cattle starting in the 1840s, and calf lymph vaccine became the leading smallpox vaccine in the 1880s. First-generation vaccines ...
Comparisons of national income are also frequently made on the basis of purchasing power parity (PPP), to adjust for differences in the cost of living in different countries. ( see List of countries by GDP (PPP) per capita ). PPP largely removes the exchange rate problem but not others; it does not reflect the value of economic output in international trade, and it also requires more ...
- Origin of The Letters IP
- Ipx9k and IPX9
- United States
- See Also
In the original IEC 60529 standard from year 1976, the letters IP are used without providing an explanation, and referred as "characteristic letters".In the next editions of the standard, from years 1989 and 1999 respectively, the IP is explained to denote "international protection" on both French and English pages. According to the Finnish nationa...
DIN 40050-9 extended the newer IEC 60529 rating system with an IP69K rating for high-pressure, high-temperature wash-down applications.Enclosures conforming with ISO 20653:2013 must be both dust-tight (IP6X) and able to withstand high-pressure and steam cleaning. The IPx9K standard was originally developed for road vehicles—especially those that ne...
In the U.S., the National Electrical Manufacturers Association defines NEMA enclosure types in NEMA standard number 250. The following table outlines which IEC 60529 IP code each respective NEMA guideline meets. Ratings between the two standards are not directly equivalent: NEMA ratings also require additional product features and tests (such as fu...
GDP (PPP) means gross domestic product based on purchasing power parity. This article includes a list of countries by their forecast estimated GDP (PPP). [2] Countries are sorted by GDP (PPP) forecast estimates from financial and statistical institutions that calculate using market or government official exchange rates. The data given on this page are based on the international dollar, a ...
English is the most spoken language in the world, primarily due to the global influences of the former British Empire (succeeded by the Commonwealth of Nations) and the United States. [7] English is the third-most spoken native language, after Mandarin Chinese and Spanish; [8] it is also the most widely learned second language in the world, with more second-language speakers than native speakers.
Lockheed Martin FB-22. The Lockheed Martin/Boeing F-22 Raptor is an American twin-engine all-weather stealth fighter aircraft developed and produced for the United States Air Force (USAF). As a product of the USAF's Advanced Tactical Fighter (ATF) program the aircraft was designed as an air superiority fighter, but also incorporates ground ...
